ProfessorOwl_PhD [any]

The 3.x tarrasque became a joke, but that was a result of the extensive options combined with people’s system understanding - sure a single wizard could kill it, but that still needed to be played by someone who understood the system. It was a system that gave unlimited options, so if you worked out how to combine enough of them you could break the system wide open, and the tarrasque was a great yardstick for that.

Then you come to 5e’s tarrasque and it’s so badly designed that it’s obvious from a glance that a level 1 character with flight can just hover above it and plink it down with a bow. I’ve seen 3.5’s brought up in comparison to that, but not as an example of difficult fights in a vacuum.

My players like to save their worst rolls for perception checks to find secret doors. Even when they specifically know there’s a secret door and just need to work out how to open it, out comes a parade of 1s and 2s.